package com.nowcoder.community.controller;

import com.nowcoder.community.annotation.LoginRequired;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;


@Controller
@RequestMapping("/user")
public class UserController {

    private static final Logger logger = LoggerFactory.getLogger(UserController.class);

    @Value("${community.path.upload}")
    private String uploadPath;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private UserService userService;

    @Autowired
    private HostHolder hostHolder;

    @LoginRequired
    @RequestMapping(path = "/setting", method = RequestMethod.GET)
    public String getSettingPage(){
        return "site/setting";
    }

    @LoginRequired
    @RequestMapping(path = "/upload", method = RequestMethod.POST)
    public String uploadHeader(MultipartFile headerImage, Model model){
        if(headerImage == null){
            model.addAttribute("error","您还没有选择图片");
            return "site/setting";
        }

        String fileName = headerImage.getOriginalFilename();
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        if(suffix == null){
            model.addAttribute("error","文件的格式不正确");
            return "site/setting";
        }
        // 生成随机文件名
        fileName = CommunityUtil.generateUUID() + suffix;
        // 确定文件存放的路径
        File dest = new File(uploadPath + "/" + fileName);
        try {
            // 存储文件
            headerImage.transferTo(dest);
        } catch (Exception e) {
            logger.error("上传文件失败：" + e.getMessage());
            throw new RuntimeException("上传文件失败，服务器发生异常！", e);
        }
        // 更新当前用户头像的路径（外部）
        // http://localhost:8080/community/user/header/xxx.png
        User user = hostHolder.getUser();
        String headerUrl = domain + contextPath + "/user/header/" + fileName;
        userService.updateHeader(user.getId(), headerUrl);
        return "redirect:/index";
    }

    @RequestMapping(path = "/header/{fileName}", method = RequestMethod.GET)
    public void getHeader(@PathVariable("fileName") String fileName, HttpServletResponse response){
        // 服务器存放路径
        fileName = uploadPath + "/" + fileName;
        // 文件后缀
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        // 响应图片
        response.setContentType("image/" + suffix);
        try (
                FileInputStream fi = new FileInputStream(fileName);
                OutputStream os = response.getOutputStream();
        ){
            byte[] buffer = new byte[1024];
            int b = 0;
            while((b = fi.read(buffer)) != -1){
                os.write(buffer, 0, b);
            }
        } catch (IOException e) {
            logger.error("读取头像失败：" + e.getMessage());
        }
    }

    @RequestMapping(path = "/updatePassword", method = RequestMethod.POST)
    public String updatePassword(String oldPassword, String newPassword, String confirmPassword, Model model){
        User user = hostHolder.getUser();
        Map<String, Object> map = userService.updatePassword(user.getId(), oldPassword, newPassword);
        if(oldPassword == newPassword){
            model.addAttribute("oldPasswordMsg", "新密码不能与旧密码相同");
            return "site/setting";
        }
        if(!newPassword.equals(confirmPassword) ){
            System.out.println(newPassword);
            System.out.println(confirmPassword);
            model.addAttribute("confirmPasswordMsg", "两次输入的密码不一致");
            return "site/setting";
        }
        if(map == null || map.isEmpty()){
            return "redirect:/index";
        }else {
            model.addAttribute("oldPasswordMsg", map.get("oldPasswordMsg"));
            model.addAttribute("newPasswordMsg", map.get("newPasswordMsg"));
            return "site/setting";
        }
    }


}
